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  • Alok Singh

    Member
    June 23, 2023 at 4:50 pm in reply to: Class 8: Probability

    To find the probability of drawing a blue marble, we need to determine the total number of marbles and the number of blue marbles in the bag.

    The total number of marbles in the bag is the sum of the red, blue, and green marbles:

    Total number of marbles = 5 red marbles + 3 blue marbles + 2 green marbles = 10 marbles

    The number of blue marbles is given as 3.

    To calculate the probability of drawing a blue marble, we divide the number of favorable outcomes (getting a blue marble) by the total number of possible outcomes (drawing any marble):

    Probability of drawing a blue marble = Number of blue marbles / Total number of marbles = 3 / 10 = 0.3 or 30%

    Therefore, the probability of drawing a blue marble from the bag is 0.3 or 30%.

  • Alok Singh

    Member
    June 23, 2023 at 4:48 pm in reply to: Class 7: Algebra and Logical Reasoning

    Let’s denote the first odd number as “x.” Since the numbers are consecutive odd numbers, the second odd number would be “x + 2,” and the third odd number would be “x + 4.”

    According to the given information, the sum of the first two numbers is 96. Therefore, we can write the equation:

    x + (x + 2) = 96

    Simplifying the equation:

    2x + 2 = 96

    2x = 96 – 2

    2x = 94

    x = 94/2

    x = 47

    So the first odd number, x, is 47. The second odd number would be 47 + 2 = 49, and the third odd number would be 47 + 4 = 51.

    Therefore, the third number is 51.

    • This reply was modified 1 year, 9 months ago by  Alok Singh.